Electrical connecter



Jan. 1925. 1,522,57g

R. B. BENJAMIN ELECTRICAL CONNECTER Filed May 18 1921 Patented Jan. 13, 1925.

. 1,522,576. PATENT OFFICE.

i UNITED STATES.

REUBEN 1a. BENJAMIN,

ELECTRIGAL Application filed May 18,

' T all whom it may concern Be it known that I, REUBEN B. BENJAMIN, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented new and useful Improvements in Electrical Gonnecters, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawing, forming a part of this specification.

My invention relates to electrical connecters.

One of the objects of my invention is to provide improved contact means for electrical connecters which will be simple in construction and easy and cheap to manufacture, and durable and efficient in use. A particular object of this invention is to provide a connecter, making use of threaded cylindrical shell contacts formed of pressed sheet metal mating halves, which together form the threaded cylindrical contact.

Another object of this invention is to pro vide for the above type of connecter, an insulated housing and retaining member, also formed of mating halves. A further object is to provide improved means of securing these mating halves together.

Further objects will appear from the detailed description to follow and from the appended claims.

In the drawings, in which several embodiments of my invention are shown- Figure 1 is a plan view of a plug receptacle embodying my invention;

Fig. 2 is a section on the line 2-2 of Fig. 1;

Fig. 3 is a section on the line 33 of Fig. 2;

Fig. 4; is a plan view of another form of plug receptacle embodying my invention;

Fig.5 is a section on the line 5-5 of Fig. 4:;

Fig. 6 is a section on the line 66 of Fig. 5;

Fig. 7 is a plan view of another form of plug receptacle; and

Fig. 8 is a section on the line 8-8 of Fig. 7

Referring to the drawings in detail, and first to the form shown in Figs. 1, 2 and 3, the plug receptacle here shown comprises a plug portion 10 to be screwed into a screwshell receptacle, and a pair of receptacle portions 11 to receive screw-threaded insertable devices, such as attachment plugs or lamps.

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1921. Serial m. 470,609.

The plug portion 10 comprises a c lindrical screw-threaded shell contact 12 w ich may be of sheet metal, supported by an insulating base 13, and a center contact 14 for engagement with the center contact of a receptacle, also supported by the insulating base 13.

The center contact 14 may be a portion of a strlp of metal havin portions extending through an opening in t e insulating base 13 as indicated at. 15, and having portions 16 bent to form center contacts for the receptacle portions 11. The threaded shell contacts for both of the receptacle portions 11 are formed in two mating halves, which can be formed of sheet metal, by stamping. The outer casing 18 which surrounds the receptacle portions 11 is also formed in two mating halves, which may be stamped from sheet metal. The fibre lining 19 between the threaded shell contacts and the outer casmg 18 is also formed in two mating halves, which may be formed by stamping. The two halves of the casing 18 may be secured together at their lower edge by means of a rivet 20 (Figs. 2 and 3), the upper edges of the mating halves of the casing 18 may be flanged outwardly as shown at 21, and the two halves may be held in proper position with respect to each other by means of a sheet metal washer or collar 22, the outer edge of which is turned down over the flanges 21, as indicated at 23.

Each half of the shell contact portion of the receptacles 11 comprises two semi-cylindrical threaded shell portions 24: which match with corresponding semi-cylindrical threaded shell portions on the other half to form a complete cylindrical threaded shell, the threads of which are continuous from one half to the other. Each of these halves also comprises a semi-cylindrical threaded shell portion 25 which matches with 2. corresponding portion on the other half to form a cylindrical threaded shell portion, over which the threaded contact 12 of the plug portion 10 is threaded. The threaded shell 12 may be secured firmly to the threaded portion 25 in any suitable manner, as by soldering. The portions 24 are formed integral with each other and with the portion 25. Each half of the casing 18 comprises two semi-cylindrical portions 26 which match up with corresponding semi-cylindrical portions on the other half to form cylindrical shells surrounding the cylindrical threaded shell contacts. Similarly, each stampin half of the insulating lining 19 comprises two semi-cylindrical portions 27 which match up with corresponding semi-cylindrical portions on the other half to form cylindrical portions surrounding the threaded shell contacts. The up er ed e of the threaded shell contact 12 is auge inwardly as shown at 28, and the upper edges of the semi-cylindrical portions 25 are flanged inwardly, as shown at 29, and the insulating base 13 is provided with an annular shoulder 30 which is held in place between the flanges 28 and 29.

By means of the above construction the halves of the threaded shell contacts and the halves of the outer casing may be formed in a very simple manner, from sheet metal The plug receptacle shown in Figs. 4, 5 and 6 comprises a plug portion 31 and two receptacle portions 32. The plug portion comprises a. cylindrical threaded shell contact 33 supported on an insulating base 34, and a center contact 35 also supported on the base 34. Each receptacle portion 32 comprises a cylindrical threaded shell contact 36 and a center contact 37. The threaded shell contact 33 comprises two mating semicylindrical portions 38, and each threaded shell contact 36 comprises two mating semicylindrical portions 39. Each semi-cylindrical portion 39 of one of the threaded shell contacts 36 is formed integral with another semi-cylindrical portion 39 of the other threaded shell contact 36, and is also formed integral with one of the semi-cylindrical threaded shell portions 38 of the threaded shell contact 33, the three semi-cylindrical portions being thus formed integrally from a single piece of metal, which may be formed into the desired shape by stamping.

The center contacts 37 may be formed from a single strip of sheet metal and-may be secured to the insulating base 34 by means of a screw 40 and nut 41. The screw 40 also serves to hold the center contact 35 in position and to electrically connect the center contact 35 with the center contacts 37. r

The casing 42 may also be formed in two mating halves, which may be stamped from sheet metal. The halves of the casing 42 may be secured together in any suitable manner, as by means of three rivets 43 extending through ears in the mating halves of the casing. In this form of my invention the insulating lining 44 between the casing 42 and the threaded shell contacts 36 may be in the form of an integral cylindrical fibre sleeve. The upper portion of insulating lining 45 between the casing 42 and the sheet metal which connects the semi-cylindrical portions 38 with the semi-cylindrical portions 39 may be in the form of a substantiall conical fibre sleeve.

T e insulating base 34 is held in place between the flange 46 on the threaded shell 33 andthe inwardly-extending projections 47 (Fig. 6) which are formed just below the semi-c lindrical threaded portions 38.

In igs. 7 and 8 I have shown my invention in connection with a plug receptacle for use in a ground-return system of wir ing. In this form of my invention the plu receptacle comprises a plug portion 48 an two receptacle portions 49. The plug portion 48 comprises a threaded shell contact 50 supported by an insulating base 51, and a center contact 52 also supported by the insulating base 51. Each receptacle portion 49 comprises a threaded shell contact 53 and a center contact 54. Each shell contact 53 comprises two semi-cylindrical threaded portions 54 which match up with each. other to form the cylindrical threaded shell contacts. Each semi-cylindrical portion 54 of one of the contacts 53 is formed inte ral with a semi-cylindrical portion 54 of t 0 other contact 53, and with a semi-cylindrical threaded extension 55, the threaded shell contact 50 being threaded down over the tension 55 and secured thereto in any suitable manner, as by soldering.

The insulating base 51 is provided with an annular flange 56 which is clamped between the inwardly-extending flange 57 of the contact 50 and the inwardly-extending flanges 58 of the extension 55. For holding the semi-cylindrical portions. 54 in proper position with respect to each other and for giving a finished appearance to the receptacle, cylindrical she ls 59 are slipped over the semi-cylindrical portions 54" and are held in place by flanging over the edges 60 of the shell contacts 53. The cylindrical shells 59 may be provided with annular beads 61, if desired, to provide means for attachment for a lamp-shade.

In this form of device the circuit is from. the center contact 52 to the center contacts 54, through the translating device to the shell contacts 53, and through the extension 55 to the threaded shell contact 50.

In this form of device, also, the threaded shell contacts 53 may be formed of sheet 'metal, by stamping.

This application is a continuation of my copending application Serial No. 187,396, filed August 21, 1917.

Having thus described my invention, What I claim as new and desire to secure by Letters Patent of the United States is:

1. A plug receptacle comprising a threaded plug shell contact for engaging a receptacle, and a threaded shell receptacle contact .for engaging an insertable device, each of said contacts comprising two mating semicylindrlcal threaded shell portions placed tggialther to form a threaded cylindrical s e 2. A plu" receptacle comprising a threaded plug she I contact for engaging a receptacle, and a threaded shell receptacle contact for engaging an insertable device, each of said contacts comprising two mating semicylindrical threaded shell portions placed together to form a threaded cylindrical shell, the semi-cylindrical portions of the plug contact being cylindrical portions of the receptacle contact, respectively.

A. plural receptacle comprising a plurality of threaded shell receptacle contacts for engaging insertable devices, each of said contacts comprising two mating semicylindrical threaded shell portions placed gether to form a threaded cylindrical shell.

a. A plural receptacle comprising a plurality of threaded shell receptacle contacts for engaging insertable devices, each of said contacts comprising two mating semi-cylindrical threaded shell portions placed Fto gether to form a threaded cylindrical shell, the semi-cylindrical portions of one receptacle contact being formed integral with the semi-cylindrical portions of another receptacle contact, respectively.

5. A connecter comprising two cylindrical screw-shell contacts each comprising two mating semi-cylindrical threaded shell portions placed together to form a threaded cylindrical shell, the semi-cylindrical portions of one contact being formed integral with the semi-cylindrical portions of the other contact, respectively, and means for holding said semi-cylindrical portions in position with respect to each other.

6. A connecter comprising two cylindrical screw-shell contacts each comprising "two mating semi-cylindrical threaded shell portions placed together. to form a threaded cylindrical shell, the semi-cylindrical portions of one contact being formed integral with the semi-cylindrical portions of the formed integral with the semi' cylindrical portion of the lining,

other contact, respectively, and means for holding said semi-cylindrical portions in position with respect to each other comprising a cylindrical casing member surrounding one of said cylindrical portions.

7. A connecter comprising two cylindrical screw-shell contacts each comprising two mating semi-cylindrical threaded shell portions placed together to form a threaded cylindrical shell, the semi-cylindrical portions of one contact bein formed integral. with the semi-cylindrical portions of the other contact, respectively, and means for holding said semi-cylindrical portions in position with respect to each other comprising a cylindrical casing member surrounding one of said cylindrical portions, said casing member comprising two semi-cylindrical portions placed together to form a cylindrical shell.

8. A plural receptacle comprising a plurality of cylindrical threaded shell receptacle contacts for engaging insertable devices, each of said contacts comprising two mating semi-cylindrical threaded shell portions placed together to form a threaded cylindrical shell,an insulating lining surrounding said contacts comprising a plurality of cylindrical portions one surrounding each contact, and a housing comprising a of cylindrical portions one surrounding each each cylindrical portion of the housing comprising two mating semi-cylindrical shell portions placed together to form a cylindrical shell, each of said last named semi-cylindrical portions of one cylindrical portion being formed integral with a semi-cylindrical portion of another cylindrical housing portion.

In witness whereof, I have hereunto subscribed my name.

REUBEN B. BENJAMIN.

plurality 

